Ancillary Services

Ancillary Services Payments

Weekly aggregated settlements data for ancillary service payments in each interconnected region, and causer pays factors data.


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Ancillary Services Market Causer Pays Data

The recovery of payments for Regulation Services is based on the 'causer pays' methodology. Under this methodology, the response of measured generation and loads to frequency deviations is monitored and used to determine a series of causer pays factors.


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